iOS 12.1.1 (build 16C50) is an official Apple over-the-air update for the iPhone 6, released on 2018-12-05T18:10:46Z. The update package is 402.92 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8110b8ce10477745ea49d9e5ea73a984deaffb11.zip.